Photographic camera having a mutual film-transport and exposure lock

ABSTRACT

A film feed and lock arrangement for photographic cameras equipped with flash cube provisions. A locking slider locks the film feed when in a first or initial position. Upon actuation of the release button of the camera and transfer of the slider to a second position, the film feed is released, with the slider contacting a surface on the release button in front of a locking edge on the button. Upon return of the release button to its initial or unactuated position, the locking slider contacts the surface behind the locking edge. After return of the release button through its initial and unactuated position, the button is locked in place by the slider. After the film feed mechanism has been actuated, the slider is returned to its first or initial position and thereby unlocks the release button. Once the slider has again reached its first position, the film feed becomes locked in place.

United States Patent 1 1' Langewiesche et al. 1 1 Jan. 9, 1973 54] PHOTOGRAPHIC CAMERA HAVING A 3,391,621 7/1968 Nerwin ..95/11 R MUTUAL FILM-TRANSPORT AND 3,538,824 11/1970 Lange ..95/11 R EXPOSURE LOCK P E S ls M h rimary xamineramue att ews [75] Inventors. wilhelm Langewiesche, Regensburg, Assistant Examiner Russen E. Adams Jr.

5:5: g g tzgfi Bunde'Enmgloh' Attorney-Sparrow and Sparrow [73] Assignee: Balda Werke Photographische ABSTRACT gel-ate a g Grum- A film feed and lock arrangement for photographic g; g cameras equipped with flash cube provisions A e/ as p a ermany locking slider locks the film feed when in a first or ini- [22] Filed: May 28, 1970 tial position. Upon actuation of the release button of the camera and transfer of the slider to a second posi- [211 Appl' 41334 tion, the film feed is released, with the slider contacting a surface on the release button in front of a [30] Foreign Application Priority Data locking edge on the button. Upon return of the release button to its initial or unactuated position, the locking June 2,1969 Germany ..P 19 28 034.3 Slider contacts the Surface behind the locking edge. After return of the release button through its initial hfgggi igg and unactuated position, the button is locked in place [58] Fieid R 11 L 5 31 FM by the slider. After the film feed mechanism has been actuated, the slider is returned to its first or initial 56] References Cited position and thereby unlocks the release button. Once the slider has again reached its first position, the film UNITED STATES PATENTS feed becomes locked in place. I

3,487,758 1/1970 Rigolini et al ..95/1 1 R 17 Claims, 10 Drawing Figures 31 2213411 1 6 128791315 M1 1| [E] 1 ii I O 1 2U 16'' d? q Q? 1 1 18 1 11% 9 l l 1 11' 42 \16 19 31 l 27 23 27' I1 17 [I r .8 e I O l 1 I I 0 3 1 PATENTEUJAN 9 ms SHEU 1 OF 3 Fig.1

IIIIIIIIIrIIl INVEA'TOA'S m L i 5 r rm.) 2 1 Stirred ATTORNEYS PATENTED JAN 9 I973 SHEET 2 BF 3 l "at PATENTEDJMI 9l975 3,709,120

SHEET 3 0F 3 PHOTOGRAPHIC CAMERA HAVING MUTUAL FILM-TRANSPORT AND EXPOSURE LOCK BACKGROUND OF THE INVENTION The present invention resides in a photographic camera in which the film feed and exposure mechanisms are alternatingly locked. After one exposure, the release mechanism is locked with the actuation of the film feed. The film feed can be actuated only once before each exposure, and the feed remains in locked position during the exposure until the release button is returned to its initial starting position after having been depressed for an exposure.

Whereas cameras of this design are already known in the art, they are generally quite complex in structure and thereby costly to manufacture and maintain. Even in a camera which is manufactured as a mass-produced article, a displaceable auxiliary slide is essential for meeting the fabrication requirements and avoiding double or vacant exposures which are undesirable. In this camera, a locking lever is used as a spring-loaded locking member for pivoting about a pin or shaft.

In view of thelarge number of separate parts within the camera, and in view of the narrow tolerances which must be observed during manufacture of the parts in order to realize a satisfactory operational relationship among the parts,-the camera mechanism is a substantially complex structure. Thus, in view of the substantial complexity of the operating mechanisms of such conventional cameras, they are costly devices.

Accordingly, it isan object of the present invention to provide a photographic camera in which the feed and exposure mechanisms are alternatingly locked through a substantially simple locking mechanism.

It is also an object of the present invention to provide a locking device of the aforementioned character, which locks the release button in place after it has been actuated and has returned to its initial position. The release button is to be held in this locked position through an auxiliary lever controlled by a flash cube holder until the flash cube has been appropriately advanced. v

The essential novel features ofthe present invention reside in the condition that a locking slider moves from an initial or first position in which the film feed is locked, into a second position upon actuation of the release button. The film feed is unlocked when the slider is in the second position. Further locking of the film feed is then performed without interruption by the depressed release button instead of the slider. After leaving its first or initial position, the slider comes into contact .with a surface on the release button and in front of a locking edge on the button. After the release button returns to its initial or unactuated position, the slider lies behind the locking edge f the release button and locks the button in place until the slider itself becomes released upon actuation of the film feed. With the return of the slider to its initial position, the film feed is locked and the release button becomes unlocked.

The special feature, an advantage of the present invention, is that only simply constructed parts are used forthe locking arrangement affecting the feed and exposure mechanisms alternatedly. The parts used in accomplishing the objects of the present invention are derived substantially from parts already existing in a camera. Unlike the requirement applicable to conventional cameras, adherence to narrow tolerances in fabrication is not required with the present invention.

SUMMARY OF THE INVENTION An arrangement for use in cameras with flash cubes,

inclined surface for receiving a locking slider. The

inclined surface is formed by a projection which is mounted vertically on the surface of the locking lug facing the locking slider. When the release button is actuated, the locking slider is pressed by this projection away from the locking lug, to the side perpendicular to the direction of displacement. Due to the resilient properties inherent in the locking slider, or due to an external spring force, resilient contact is accomplished with the projection until the release button has returned to its initial position. At that time, the locking slider is situated under the projection and prevents any further release action.

In another embodiment of the present invention, the locking lug has an S-shaped bend through which the lug engages the locking or feed wheel for the film. The end of the locking slider cooperates with the grooves of the feed wheel and is constructed so that it becomes located in the space next to the locking lug, during the locking engagement with respect to the feed wheel. Then the release button is actuated, the end of the locking slider engaging the feed wheel, slides along the S-shaped lug and is pressed by the projection from this S-shape to one side. Upon return of therelease button to its resting position, the locking slider becomes situated under the lower edge of the lug and thereby prevents any further actuation of the release button.

The cooperation between the release button and the locking slider of the present invention is particularly adaptable for the control of an automatic mechanism used with a positive flash stepping system. The film feed is also locked after use of all lamps in a flash cube. The movement of the locking slide when it is swung under the locking edge of the release button, is trans mitted to a counting slider which engages a locking lug in the feed wheel after the last flash lamp has been used. The counting slider which is moved into the path of motion of the locking slide, when the flash cube is inserted, is provided with teeth adapted to the number of lamps in the flash cube.

Various further and more specific purposes, features and advantages will clearly appear from the detailed description given below taken .in connection with the accompanying drawings which form part of this specification and illustrate merely by way of examples, embodirnents of the device of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS In the following description and in the claims parts will be identified by specific names for convenience but such names are intended to be as generic in their application to similar parts as the art will permit. Like reference characters denote like parts in the several figures of the drawing, in which FIG. 1 is a front view of the camera, of the present invention, with the housing shown partially in section;

FIG. 2 is a plan view of the camera of FIG. 1 with the top of the housing removed;

FIGS. 3a and 3b are schematic views of the locking slider, release button and feed wheel used in the arrangement of the present invention;

FIG. 4 is a schematic view of the locking slider, the trigger and the feed wheel;

FIG. 5 is a schematic view showing the cooperative relationship of the locking slider and the counting slider in the arrangement of the invention;

FIGS. 6a and 6b are schematic plan and side views respectively, of the counting slider, the locking slider, the locking lug and the feed wheel in cooperative relationship;

FIGS. 7a and 7b are schematic plan and side views respectively of another embodiment of the arrangement of FIG. 6.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In referring to the drawing, a camera housing or casing 1 has a feed wheel 2 with internal teeth 3. This wheel 2 is mounted in a conventional manner, not shown in detail in the drawing. Mounted eccentrically with respect to this feed wheel 2 is a spur gear 4 in mesh with the internal teeth 3 of the wheel 2. The gear 4 transmits, through a shaft 5, the rotary motion of the film feed to the film take-up spool, not shown in the drawing. A cover plate 1', shown in FIG. 1, has a substantially cylindrical recess 6 for receiving the base of a flash cube, not shown. A concentric bore 7 for mounting the flash cube holder 8 is also provided. A disc 9 is firmly connected or secured to the flash cube holder 8 and has projections 10, ll, 12 and 13 displaced from each other by an angle of 90, along the circumference of the disc. The flash cube holder 8 and/or the disc 9 is connected to the ring gear 17 engaging the teeth 14 of the feed wheel, through a slip clutch, not shown.

An auxiliary lever 16 is joumaled to pivot about a pin or shaft 18 on the release button 17. The lever is springloaded through a torsion spring 19 andcooperates with the stop projections to 13. One arm of the spring 19 is secured to a stop 20 on the release button 17, while the other end or arm of the torsion spring engages behind a lug 21 of the auxiliary lever 16. The lower end of the lever 16 cooperates with the locking slider 22 of the present invention, which reaches into the splined edge or surface 33 of the feed wheel 2.

At the same time, this locking or blocking slider 22 may be .provided with a guide plate 23 for this purpose. As shown by the construction of FIG. 2, the guide plate tapers at its end facing the film 24, and forms a finger 23' reaching into the film perforations 24'. The finger 23 extends through a bore 25 within a partition 26 of the housing for supporting the locking slider 22. At the end of the locking slider 22, remote from the-film 24, the slider extends through a rectangular opening 27 in a plate 29 which supports the release button 17 and the shutter mechanism, not shown, for the exposure aperture 28. A triangular-shaped surface 30 is mounted perpendicular to the guide plate 23, and consists preferably of plastic material.

The surface 30 cooperates, in the form of an inclined plane, with an edge 31 of the release button 17, as shown in FIG. 1. The displacement of the slider 22 is thereby produced against the spring 32. The latter tends to bring the slider towards the film 24 and into engagement with one of the grooves 33 provided on the outer edge of the film feed wheel, as shown in FIG. 3a. The release button 17 is connected to a locking lug 34, as shown in the drawing, which can engage the splined edge of the feed wheel 2 in a manner similar to that of the locking slider 22, and thereby release temporarily the slider.

As illustrated in the embodiments of FIGS. 2 and 3, the locking lug has a projection 35 which projects perpendicular from the upper surface of the locking lug 34 facing the slider 22. The projection 35 slides into the slider 22 when the release button 17 is actuated. To prevent the locking slider 22 from remaining in contact with the projection 35, the latter and/or slider 22 are chamfered on their contact 5 surfaces, so that the slider 22 can easily glide or slide over the projection 35. In a modified embodiment, shown schematically in FIG. 4, the lug 34 has a bent S shape directed away from the slider 22 at its end cooperating with the feed wheel 2. In this embodiment, the slider 22 is situated in the space provided by this design, so that it is located with its end engaging the feed wheel in one plane, with the part 34 of the surface 34 adjacent to the release button 17. In this embodiment, furthermore, the slider 22 is also bent at its end remote from the feed wheel 2, so as to form an inclined surface for facilitating sliding on to the inclined surface of the lug 34 when the release button 17 is actuated, as shown in FIG. 2.

In both of the preceding embodiments, the lug 34 and slider 22 extend parallel to each other, at least at their ends engaging the feed wheel. The lug 34 and the slider 22 are preferably arranged close to each other so that they reach into two grooves of the feed wheel 2 that are located adjacently to each other. Resilient contact of the slider 22 with the lug 34 results only through the natural resilience of the slider or through the spring 32. The operating direction of the spring, for this purpose, extends at an incline to the direction of displacement of the slide 22.

To illustrate the operation of the camera, assume that the camera is set for use, and that the film feed has already been operated. The locking slider 22 is then in its initial position, shown in FIGS. 2, 3a and 4. In that position, .the slider 22 engages the feed wheel 2 in a locking manner, while the locking lug 22 is disengaged from the feed wheel 2, as shown in FIG. '2. The camera is then ready to be used for an exposure. If, now, the release button 17 is depressed against the return spring 37, in FIG. 1, the edge or surface 31 comes into contact with the inclined surface of the triangular part 30. The latter functions as an inclined plane and moves the locking slider 22 progressively against the force of spring 32, and out of engagement with the feed wheel 2 so that it occupies its second position. However, just before the slider 22 leaves its locking position on the feed wheel 2, the lug 34 enters a groove 33 of the feed wheel, and takes on the further locking action. Complete locking of the film feed in the transitional phase is positively assured when the space between the edge 31 of the release button 17 and the inclined plane 30, is arranged so that the lug has already engaged the feed wheelbefore the edge 31 contacts the inclined plane.

The auxiliary lever 16 is permanently in contact with the guide surface 23 of the slider 22, as shown in FIG. 1. When the slider 22 has reached its second position, the lever 16 reaches into a slot 16' in the guide surface, and thereby locks the slider into its second position, as may be seen from FIG. 6a and 7a. The locking slider which has dropped resiliently on the projection 35 or on theprojecting part of the S-shaped lug 34, becomes then situated under the lug 34 after the return of the release button 17, as shown in FIGS. 3a and 3b through dashed lines. The resilient action may be due to either the natural inherent resilience of the slider, or due to the force of an external spring suchas spring 32, for example. After the release button 17 has returned, the lug 34 becomes disengaged from the feel wheel 2, so that the latter can be actuated for the purpose of further feeding film. The disc 9 on the flash cube holder8 is then rotated in the conventional manner, through the teeth 14, the ring gear and the slip clutch, not shown. One of the projections 10 to 13 becomes placed against the lug 38 on the auxiliary lever 16 and pivots it around the pin or shaft 18, until this lever is in contact with a fixed abutment 1" This action which may be seen from FIGS. 1 and 2, prevents further rotation of the flash cube holder 8 actuated through the slip clutch, while any film that is still present may be continued to be fed. At the end of the pivoting motion, the auxiliary lever 16 releases the slider 22, and as a result, the latter tends to return to its initial position, under the action of the return spring 32. When no film is present in the camera, this process takes place immediately. When, on the other hand, film is present, the action takes place only when the finger 23 can reach into a perforation of the film 24. When the locking slider 22 has completely returned to its initial position, the film feed is again locked, and the release button 17 is released.

Although the preceding description of the present invention applies to a camera with positive flash cube stepping arrangement, the relationship of a release button and a locking lever as provided by the present invention, is not limited to the use in such a camera. The release button and locking lever of the present invention are designed to achieve alternating exposure and locking of the feed, and this relationship has a wider range of applications. This is particularly the case since methods other than those described above may be readily used for locking the slider 22 into its second position, and releasing it only after the stepping or advance of the film feed has been completed.

In a camera with a positively set or indexed flash cube holder as set forth above, however, special advantages exist because the pumping movement of the lockingslider can be used for controlling an automatic mechanism which locks the film feed, after all of the lamps of'the flash cube have been used up. Such an automatic mechanism is schematically illustrated in FIGS. 5 to 7. This automatic mechanism consists substantially of a counting slider '39 having, on one side, a plurality of driving teeth 40 with recesses or gaps 40' between them. Q

As shown in FIG. 5, the locking slider 22 has a recess 41 at its end remote from the feed wheel. This recess 7 makes itpossible for the counting slider 39 to be outside of the path of motion of the slider 2, when the counting slideris in its stationary position, shown in solid lines in FIG. 5. This condition applies to the case when the flash cube is absent. The counting slider is supported so as to be laterally displaceable. This is accomplished through two guide rivets or pins 44 and 45 passing through an elongated slot 43. Additional guidance is provided through the pin 46 passing through a similarly elongated slot 47. Although the pins or rivets 44 and 45 allow the counting slider 39 to be displaced in only one direction, two degrees of freedom are available with respect to the pin 46. Thus, one degree of freedom lies in one direction in the plane of the drawing, whereas the other degree of freedom is perpendicular to this plane of the drawing. If a flash cube is inserted into the holder, not shown in FIGS. 5 to 7, the counting slider 39 leaves its stationary or resting position shown in solid lines in FIG. 5. This action is against the inherent resilience of the counting slider itself. The counting slider is transferred into the operative position indicated through dashed or broken lines, and as a result its driving teeth 40 are, now situated in the plane of motion of the slider 22.

Whenever the release button is actuated, the locking slider 22, which is deflected by the projection 35 on the lug 34, is guided into a recess 40'. Upon the return of the release button to its resting position, the slider 22 pushes the counting slider 39 by pivoting under the locking lug 34. This motion is towards the left and against the spring 48. The motion takes place over the width of a tooth 40 and a space 40'. When the release button 17 is actuated, the slider 22 is returned to its first position. Upon the next exposure, thereby, this slider engages or reaches into the following space 40. As a result, the slider 22 pushes, thereby, the counting slider 39 towards the left again by the amount of one tooth. Any undesirable-recoil action of the counting slider is prevented through the spring 49. If the release button has returned to its stationary or inoperative position after the use of the last flash lamp in the cube, the slider 33 is pushed back under the action of the slider 22. The counting slider 33 is pushed back to the extent that the lug 50 engages or reaches into the feed wheel 2 and locks, thereby, the film feed until the used flash cube is removed from theholder. The counting slider is then disengaged from the locking spring or bolt 49, jumping up under its own resilient properties, and the slider is returned to its starting position through the action of the spring 48.

The second embodiment of the mechanism shown in FIG. 7 differs from the embodiment illustrated in FIGS. 5 and 6 only in the manner in which the counting slider 39 or its teeth 40 is brought into the path of motion of the locking slider, when the flash cube is inserted into the holder. Thus, the counting slider 39 or teeth 40 is moved into the path of motion of the locking slider through lateral displacement instead of being depressed as in FIGS. 5 and 6. When the flash cube is not inserted,'the counting slider 39 is subjected to the forces of two tension springs 51 and 52, in a position in which this slider 39 is pushed out of the path of motion of the locking slider 22 and towards the release button 17. The two tension springs 51 and 52 can, of course,.be replaced through an equivalent single spring. The two guide pins or rivets 53 and 54 are situated in the angled part of the slots 55 and 56, as

automatic shown in dashed lines in FIG. 7a. When the flash cube is inserted, the counting slider 39 is brought, through its teeth, within the path of motion of the locking slider 22, away from the release button 17. This is accomplished, for example, through an inclined plane 57 which is pressed by the pin 42 against the counting slider 39 or its edge 39', shown in FIGS. 7a and 7b. Pin 52 and the inclined plane 57 may, of course, also consist of a single integral part made preferably of plastic material. The guide pins or rivets 53 and 54 are then within the actual displacement path of the guide slots 55 and 56, when the flash cube is inserted, so that the counting slider is displaced with each release to the left by the distance of one tooth. The displacement is made against the action of the spring 51. A spring-mounted locking bolt 58 prevents any undesirable back movement of the counting slider 39. This bolt 58 is secured to the wedge-shaped part provided with the inclined surface, and reaches into the teeth 59 of the counting slider. When the flash cube is removed, the part 57 as well as the pin or shaft 2 are pressed in the upward direction by the spring 50 As a result, the bolt 58 leaves the teeth 59 on the counting slider, and the latter returns to its resting or quiescent position through the action of the two springs 51 and 52. A counting disc with outer and inner teeth may also be used in place of the counting slider for the purpose of avoiding a longitudinal guide. A concentric torsion spring may then be used for the return motion.

In order to prevent the counting slider 39 and lug 34 from interfering with each other, the lug may be provided with a recess 34". The lug 50, furthermore, may also be replaced through a lug 50 which is more closely adjacent to the locking members 22, 34. At the same time, the member 22 and lug 50' may be adjacent to fixed stops 6] and 62, respectively. These stops serve as abutments in the locking position.

.While the invention has been described and illustrated with respect to certain preferred examples which give satisfactory results, it will .be understood by those skilled in the art after understanding the principle of the invention, that various changes and modifications may bemade without departing from the spirit of the invention.

What is claimed is:

1. A film feed transport and exposure locking arrangement for a photographic camera with a socket adapted to receive a multilamp flashunit and means for indexing said socket comprising, in combination, release means for executing an exposure when actuated and having a locking edge; film feed means for advancing film in said camera; locking slider means moved by actuation of said release means from a first position to a second position, said locking slider means locking in said first position said film feed means, said locking slider means unlocking said film feed means in said second position and locking said release means after the exposure; means for moving said locking slider means from said second position to said first position, said locking slider means contacting a surface on said release means when said locking slider means leaves said first position upon actuation of said release means, said locking slider means being brought resiliently onto said surface and into a ready position in front of said locking edge, said locking slider means engaging said locking edge upon return of said release means from the actuated position into the unactuated position and thereby locking said release means against further actuation prior to advancement of further film; slider return means for returning said locking slider means to said first position from said second position; and an auxiliary lever con'trolably positioned by said socket and engaging said locking slider means in said second position forlocking said slider means in said second position against the action of said slider return means urging said locking slider means to move into said first position, said locking slider means being held locked in said second position by said auxiliary lever until said auxiliary lever is removed from said locking slider "means by said socket after said socket has been advanced through said indexing means, whereby said locking slider means is released from said auxiliary lever; a rotatable film feed wheel on said film feed means and having grooves on the outer edge of said wheel, said surface being on said wheel for contacting with said locking slider means; and locking lug means on said release means for moving into one of said grooves upon actuation of said release means.

2. The arrangement as defined in claim 1 wherein said locking lug and said locking slider means enter two substantially adjacent grooves on said wheel.

3. The arrangement as defined in claim 2 including a projection on said locking lug and perpendicular to the surface of said locking lug, said projection being directed toward said locking slider means and contacting said locking slider means when moved out of said first position, said locking slider means being situated under said projection after reaching said second position and return of said release means to said unactuated position for preventing subsequent actuation of said release means before actuation of said film feed means.

4. The arrangement as defined in claim 1 wherein said locking lug has an S-shaped end engaging said feed wheel, the end of said locking slider means cooperating with said grooves on said feed wheel during locking of said feed wheel and being situated adjacent to said S- shaped end of said locking lug, said end of said locking slider means and said locking lug being substantially in the same plane and adjacent to said release means, so that upon actuation of said release means said locking slider means slides along said locking lug and is pressed to one side by said S-shaped end whereby said locking slider means becomes situated in said first position under the lower edge of said locking lug.

5. The arrangement as defined in claim 1 including an inclined surface on said locking slider means and contacting an edge on said release means upon actuation of said release means; return spring means acting against the motion of said locking slider means when displaced from said first position to said second position through said inclined surface, said locking slider means being held in said second position until said film feed means is actuated; and auxiliary slider means for locking said locking slider means in said second position.

6. The arrangement as defined in claim 5 wherein said locking lug is arranged relative to said edge on said release means and said inclined surface so that displacement of said locking slider means begins only after said locking lug has engagingly reached into a groove of said feed wheel.

7. The arrangement as defined in claim 6 including support means for supporting said locking slider means in a direction perpendicular to the axis of said feed wheel and perpendicular to the plane of the film advanced by said film feed means.

8. The arrangement as defined in claim 6 including a guide plate for supporting and guiding said locking slider means, said guide plate being reduced in cross sectional area at one end to form a feeier portion cooperating with the film perforations in said film.

9. The arrangement as defined in claim 8 including a triangular-shaped element carried bysaid guide plate and functioning as an inclined surface, said guide plate also carrying a slot extending perpendicular to the direction of motion of said locking slider means, said auxiliary lever engaging said slot.

10. The arrangement as defined in claim wherein said return spring acts in the direction whereby said locking slider means contact simultaneously said release means.

11. The arrangement as defined in claim 1 including positively stepped cube means; counting slider means for locking said film feed means after use of the last lamp of said flash cube means and means for pivotally moving said locking slider means under said locking edge of said release means when a flash cube is inserted in said flash cube means.

12. The arrangement as defined in claim 11 including spring means acting against the displacement of said counting slider means, said counting slider means having a plurality of teeth moved into the path of motion of said locking slider means upon insertion of a flash cube, said teeth moving under said edge of said release means when engaged by said locking slider means for displacing said counting slider means against said spring means.

13. The arrangement as defined in claim 12 including means for pressing said counting slider means upon insertion of said flash cube.

. 14. The arrangement as defined in claim 12 including means for urging said counting. slider means laterally into the path of motion of said locking slider means upon insertion of said flash cube; and return spring means acting against the motion of said counting slider means when moved into the path of motion of said locking slider means.

15. The arrangement as defined in claim 11 including a locking lug on said counting slider means for engaging one of the grooves of said feed wheel and thereby locking said film feed means after use of the last flash lamp.

16. The arrangement as defined in claim 12 including spring mounted locking bolt means cooperating with said teeth for preventing displacement of said counting slider means by said spring means acting on said counting slider means when a flash cube is inserted into said flash cube means, said counting slider means being released for return to the initial position of said counting slider means by said spring means acting thereon upon removal of a used flash cube.

17. The arrangement as defined in claim 1 including flash cube means; and metering disc means for counting flashes and locking said film feed means after use of the last lamp of said flash cube means. 

1. A film feed transport and exposure locking arrangement for a photographic camera with a socket adapted to receive a multilamp flash unit and means for indexing said socket comprising, in combination, release means for executing an exposure when actuated and having a locking edge; film feed means for advancing film in said camera; locking slider means moved by actuation of said release means from a first position to a second position, said locking slider means locking in said first position said film feed means, said locking slider means unlocking said film feed means in said second position and locking said release means after the exposure; means for moving said locking slider means from said second position to said first position, said locking slider means contacting a surface on said release means when said locking slider means leaves said first position upon actuation of said release means, said locking slider means being brought resiliently onto said surface and into a ready position in front of said locking edge, said locking slider means engaging said locking edge upon return of said release means from the actuated position into the unactuated position and thereby locking said release means against further actuation prior to advancement of further film; slider return means for returning said locking slider means to said first position from said second position; and an auxiliary lever controlably positioned by said socket and engaging said locking slider means in said second position for locking said slider means in said second position against the action of said slider return means urging said locking slider means to move into said first position, said locking slider means being held locked in said second position by said auxiliary lever until said auxiliary lever is removed from said locking slider means by said socket after said socket has been advanced through said indexing means, whereby said locking slider means is released from said auxiliary lever; a rotatable film feed wheel on said film feed means and having grooves on the outer edge of said wheel, said surface being on said wheel for contacting with said locking slider means; and locking lug means on said release means for moving into one of said grooves upon actuation of said release means.
 2. The arrangement as defined in claim 1 wherein said locking lug and said locking slider means enter two substantially adjacent grooves on said wheel.
 3. The arrangement as defined in claim 2 including a projection on said locking lug and perpendicular to the surface of said locking lug, said projection being directed toward said locking slider means and contacting said locking slider means when moved out of said first position, said locking slider means being situated under said projection after reaching said second position and return of said release means to said unactuated position for preventing subsequent actuation of said release means before actuation of said film feed means.
 4. The arrangement as defined in claim 1 wherein said locking lug has an S-shaped end engaging said feed wheel, the end of said locking slider means cooperating with said grooves on said feed wheel during locking of said feed wheel and being situated adjacent to said S-shaped end of said locking lug, said end of said locking slider means and said locking lug being substantially in the same plane and adjacent to said release means, so that upon actuation of said release means said locking slider means slides along said locking lug and is pressed tO one side by said S-shaped end whereby said locking slider means becomes situated in said first position under the lower edge of said locking lug.
 5. The arrangement as defined in claim 1 including an inclined surface on said locking slider means and contacting an edge on said release means upon actuation of said release means; return spring means acting against the motion of said locking slider means when displaced from said first position to said second position through said inclined surface, said locking slider means being held in said second position until said film feed means is actuated; and auxiliary slider means for locking said locking slider means in said second position.
 6. The arrangement as defined in claim 5 wherein said locking lug is arranged relative to said edge on said release means and said inclined surface so that displacement of said locking slider means begins only after said locking lug has engagingly reached into a groove of said feed wheel.
 7. The arrangement as defined in claim 6 including support means for supporting said locking slider means in a direction perpendicular to the axis of said feed wheel and perpendicular to the plane of the film advanced by said film feed means.
 8. The arrangement as defined in claim 6 including a guide plate for supporting and guiding said locking slider means, said guide plate being reduced in cross sectional area at one end to form a feeler portion cooperating with the film perforations in said film.
 9. The arrangement as defined in claim 8 including a triangular-shaped element carried by said guide plate and functioning as an inclined surface, said guide plate also carrying a slot extending perpendicular to the direction of motion of said locking slider means, said auxiliary lever engaging said slot.
 10. The arrangement as defined in claim 5 wherein said return spring acts in the direction whereby said locking slider means contact simultaneously said release means.
 11. The arrangement as defined in claim 1 including positively stepped cube means; counting slider means for locking said film feed means after use of the last lamp of said flash cube means and means for pivotally moving said locking slider means under said locking edge of said release means when a flash cube is inserted in said flash cube means.
 12. The arrangement as defined in claim 11 including spring means acting against the displacement of said counting slider means, said counting slider means having a plurality of teeth moved into the path of motion of said locking slider means upon insertion of a flash cube, said teeth moving under said edge of said release means when engaged by said locking slider means for displacing said counting slider means against said spring means.
 13. The arrangement as defined in claim 12 including means for pressing said counting slider means upon insertion of said flash cube.
 14. The arrangement as defined in claim 12 including means for urging said counting slider means laterally into the path of motion of said locking slider means upon insertion of said flash cube; and return spring means acting against the motion of said counting slider means when moved into the path of motion of said locking slider means.
 15. The arrangement as defined in claim 11 including a locking lug on said counting slider means for engaging one of the grooves of said feed wheel and thereby locking said film feed means after use of the last flash lamp.
 16. The arrangement as defined in claim 12 including spring mounted locking bolt means cooperating with said teeth for preventing displacement of said counting slider means by said spring means acting on said counting slider means when a flash cube is inserted into said flash cube means, said counting slider means being released for return to the initial position of said counting slider means by said spring means acting thereon upon removal of a used flash cube.
 17. The arrangement as defined in claim 1 including flash cube means; and metering disc means for counting flashes and locking said film feed means after use of the last lamp of said flash cube means. 